Fire extinguisher



Jan. 5 1926. 1,568,084

G. 1'. PEARsoNs FIRE EXTINGUISHER Filed Feb. 28, 1916 Patented Jan. 5, 1926 UNITEDVSTATES PATENT OFFICE.

GEORGE T. PEARSONS, OF NEW YORK, N. Y., ASSIGNORTO PYRNE MANUFACTURING COMPANY, or" NEW YORK, N. Y.,

A CORPORATION OF DELAWARE.

FIRE XTINGUISHER.

Application led February 28, 1916. Serial No. 80,796.

To valf/lem t 12mg/ concer-11i:

Be it known that I, Gnonsn T. PnAnsoNs,

a citizen of the United Statearesiding in the borough of Manhattan, in the city, county, and State of New York, have in vented new and useful Improven'ients in Fire Extinguishers, of which the following is a specification.

This invention relates to syringes in which a streamer jet of liquid is ejected from a reservoir during each outward and inward movement of the piston, and it is the object of the invention to provide improved means to obtain this result which are simple and cheap in construction, e'llicient in operation, and adapted for lire extinguishers.

A further object ofthe invention is to provide means connected to the inlets 'to the piston chamber ,whereby the liquid is drawn into the chamber from the lowermost vpart of the reservoir no matter in what position the discharge outlet of the syringe may be,x and to provide improved'means to permit of the ready connection and disconnection of said former means to the inlets of the piston chamber and toV maintain a tight connection between the same. s

,Furtherobjects and advantages will hereinafter appear.

In carrying outk the invention I provide a reservoir having an outlet with a cylinder therein having inlets adjacent its ends controlled byvalves opening into the cylinder and closing outward thereof, and said cylinder having` outlets adjacent its ends connected tothe outlet of the reservoir with valves opening` outward fromthe cylinder and closing into the same, whereby the liquid is drawn into the cylinder alternately to opposite ends of the piston and discharged therefrom alternately from opposite ends of the piston and out through the reservoir outlet. j

.in the drawing accompanying and forming a part of this specification there is shown a longitudinal sectional elevation of a syringe with an embodiment of my invention applied thereto. j n

The embodiment of my invention shown in the drawing consists of a tank or reser- Lvoir for a lire extinguishing liquid comprising a body portion 1, preferably cylindrical 4in shape, and the ends 2 and 3 secured there to as by soldering or otherwise, the end 2 ITS having a discharge outlet 4 and the end 8 a filler opening closed by a plug` 5, said plug being constructed with an inwardly opening and outwardly closing spring check valve to permit the entrance of air into the reservoir to displace the liquid as it is ejected therefrom. The end is preferably dished to permit of the standing of the syringe upon a horizontal surface.`

Mounted in the reservoir eccentric to the axis thereof and adjacent one side is a piston chamber comprising a cylinder 6 closed at-opposite ends by heads 7 and S with ports 9 and 10 through the heads to the cylinder to provide inlets to the cylinder atv opposite ends. The cylinder has a port 11 communicating with the reservoir to constitute an outlet therefor with a spring influenced valve 12 closing into the cylinder and opening outward therefrom, and a port 13 in the head Scoinmunicating with the cylinder to constitute an outlet for the op'- posite end of the cylinder, connnunication between said port and the cylinder being controlled by a spring influenced. valve 14e closing into thel cylinder and opening out'- ward therefrom.' The said port 13 is` at all times connected to the port 11 by a tube 15, as shown at 16. The piston, chamber extends from the reservoir end 3 but not to the full length' of the reservoir,`the outlet 11 of the piston chamber being connected to the outlet t of the reservoir by a chamber 17 in the form of a tube, for a purpose to be hereinafter described.

The cylinder 6 has a driving fit with thc cylinder heads and 8 and the head 8 has a boreextending therethrough of the same diameter asthe diameter of the cylinder 6 to constitute a continuation thereof. The piston chamber is mounted in the reservoir with the head 8 abutting against the inner wall of the reservoir end 3, a flanged threaded nut 20 having screw threaded connection with said cylinder head with the flange of thenut engaging outside of the reservoir end 3 thereby clamping said end between the flange ofthe nut and the cylinder end S and firmly securing the piston chamberV thereto.

A piston 18 having a suitable packing is adapted to be reciprocated in the cylinder 6 by a rod 19 fixed at one end to the piston, the said rod extending through an opening in the nut 2O and packing retained in a recess in said nutby a nut 2l through which the rod passes to the exterior of the piston chamber, and reservoir, and has an operating handle 22 lixed to said projecting end.

As stated the piston chamber is located at one side ot the center or axis of the reservoir to lie adjacent the side and to permit of the drawing of the liquid from the lowerinost part of the reservoir I provide a tube 22 connected at opposite ends with the cylinder inlets 9 and l0, as shown at 24 and 25, a branch tube 26 connecting the tube 22 with a tube 27 extending longitudinally ot and with its end adjacent the ends and sides ot the reservoir. The connection of the branch tube 2G with the tube 22 is preferably in vthe ,torni ot' a T-coupling 30 and the tube being in a pair ot sections connected to said coupling. The end ot the coupling communicating with the inlet 9 of the cylinder has a spring` influenced valve opening into the said inlet and the piston chamber and closing outward therefrom, and the opposite end of the coupling communicating with the inlet l() ot the piston cl amber has a spring influenced valve 29 opening into said inlet and the piston chamber and closing outward therefrom.

To permit the tube 22, to be readily connected or disconnected from the inlets to the piston chamber, and to maintain a tight joint between said tube and the inlets of the piston chamber the angular extentions 24 and 25 ot the inlets 9 and 10 have inclined o r cone-shaped 'sea-ts 3l and 32. @ne yend of the tube 22 has fixed thereon a collar, as shown at 253, having a cone-shaped portion to engage in the seat 31. The end of the tube 22 extends slightly beyond the collar as shown. The opposite end of' the tube 22 extends into the portion 25 of the inlet 10 and has slidably mounted thereon a collar B-lhaving a cone-shaped portion to co-operate with the seat 32 and maintained seated therein by a spring 35 coiled about the tube 212 and conlined between a. collarBG tixed to the tube and a stulling box 37 earriedliy the collar r3-.l and through which the tube passes. .t will be obvious that the tension ot thc spring 35 will tend to torce the tube endwise and thereby the collar 33 to the seat 31 and to torce the collar Sel to the seat, 32. To remove the tube and its connected parts it is only necessary to move the tube toward'the collar against the tension ot the spring 35 when the end with the collar may be readily removed and then the opposite end withd v`n. By the provision of the spring 35 a vic ng connection is provided between the tube and the inlets to the piston chamber permitting of the ready swinging of the said tube.

Should the resi-voir be partially emptied l prevent suckingot air through the inlets l ot the tube 27 should the syringe be heid in a position with the discharge outlet inclining downwardly or upwardly from the horizontal, said ends are provided with gravity-seated inwardly closing and outwardly opening valves 38 and 39, consisting of balls connected by a rod a() extending through the tube and the said balls adapted to co-operate with valve seats formed at or connected to the ends ot' the tube 27.

In operation, assuming the syringe to be held in a horizontal position with the'piston chamber uppermost, as the piston is drawn out it will unseat the valve 28 drawing liquid through the port 9 into the piston chamber in liront ot the piston, the piston at the saine time ejecting air which may be in back of the piston out through the outlet port 13, tube l5, outlet ll, tube 17 and the reservoir outlet el. Upon the piston being moved inward it will eject the liquid previously drawn into the cylinder in front of the piston out through the port ll, tube 17 and the reservoir outlet, and simultaneously therewith unseat the valve 29 and draw liquid from the reservoir through the port l() into the cylinder in back of the piston, which liquid is discharged from in back ot the piston upon the next outward movement of the piston through the port 13, tube l5,

outlet ll, tube 17 and the reservoir outlet. i"

This operation is repeated so long as the piston is reciprocated. The outlet of the reservoir is preferably restricted and as the liquid is drawn from the reservoir and ejected into the chamber or tube 17, this volume of liquid being greater than what can be ejected through the restricted outlet the incoming liquid will tend to create a pressure in said chamber and thereby increase the force of the ejected stream.

During the operation of pumping there is created a siphon trom one ot the inlets to the piston chamber and the outlet thereotl to the outlet ot the reservoir, which Siphon has a tendency to be maintained when pumping ceases, and to overcome this siphon I provide an air inlet to the outlet ot the piston chamber, shown at #l-l, having an outwardly closing and inwardly opening spring check valve.

Having thus described my invention I claim:

l. In a syringe, the combination with a reservoir having an outlet at one end; a piston chamber in the reservoir connected at both ends to the reservoir outlet; inlets at opposite ends of said chamber; a piston; a piston rod to extend to the exterior' of the piston chamber and cylinder to reciprocate the piston; a tubular suction intake connected to the inlets of the piston chamber to swing on an axis longitudinally of the piston chamber and reservoir: and collars on said tubular intake having cone-shaped portions to cooperate with cone-shaped seats in the inlets to thepiston chamber, substantially as and for the purpose specified.

2. In a syringe, the combination with a reservoir having an outlet at one end; a piston chamber in the reservoir connected at both ends to the reservoir outlet; inlets at opposite ends of the said chamber; a piston; a piston rod to extend to the exterior of the piston chamber and reservoir to reciprocate the piston; and suction intakes connected to the inlets of the piston chamber coi'nprising a tube extending longitudinally of the cylinderWith its ends lying adjacent the sides and at opposite ends of the reservoir, a second tube connected to the first tube and at opposite ends communicating with the inlets of the piston chamber, and collars on said tube having a cone-shaped portion to co-operate with corresponding seats in the inlets to the piston chamber, substantially as and for the purpose specified.

3. In a syringe, the combination with a reservoir having an outlet at one end; a piston chamber in the reservoir connected at both ends to the reservoir outlet; inlets at opposite ends of the said chamber; a piston; a piston rod to extend to the exterior of the piston chamber and cylinder to reciprocate the piston; and a tubular suction intake having a part extending longitudinally of the reservoir With inlets adjacent the sides and opposite ends of the reservoir, and having a part communicating with the inlets to the piston chamber; and collars on said part of the tubular suction intake communicating with the inlets of the piston chamber having cone-shaped portions to co-operatewith correspondingly i'ormed yseats in Ithe piston chamber inlets, substantially as and for the purpose speciied.- j

4. In a syringe, the combination With a reservoir having an outlet at one end; a piston chamber in the reservoir connected at both ends to the reservoir outlet; inlets at opposite ends of said chamber; a piston; a piston rod to reciprocate the piston; and suction intakes connected to the inlets of the piston chamber, comprising a tube extending longitudinallj7 of the cylinder with its ends lying adjacent the sides and at opposite ends of the reservoir, a second tube connected to the first tube and at opposite ends communieating With the inlets to the piston chamber, a collar fixed on said latter tube having a cone-shaped portion to co-operate With a correspondingly formed seat in one of the inlets to the piston chamber; a collar slidably mounted on said tube having a coneshaped portion to co-operate with a correspondingly formed seat in the other inlet of the piston chamber, and a spring to co-operate With said latter collar and the tube to maintain the collars seated in the inlets tok the piston chamber, substantially as and tor the purpose specified.

5. In a syringe, the combination with reservoir having an outlet at one end; a piston chamber in the reservoir connected at both ends to the reservoir outlet; inlets at opposite ends of said chamber; a piston; a piston rod to reciprocate the piston; said piston chamber, piston and piston rod being located at one side of the longitudinal center of the reservoir; and suction intakes connected to the inlets of the piston chamber to swing on an axis centrally of the reservoir and in a plane parallel with the piston chamber, comprising a tube extending lon-- gitudinally of the reservoir with its ends adjacent the sides and at opposite ends of the reservoir, valves connected by a rod passing through the tube, to co-operate with valve seats at the ends ot said tube, a second tube connected to the first tube and at opposite ends communicating with the inlets of the piston chamber, a collar fixed on said latter tube having a cone-shaped portion to co-opcrate with a correspondingly orn'ied seat` in one of the inlets to the piston chamber, a collar slidably mounted on said tube having ra cone-shaped portion to co-operate with a correspondingly formed seat in the other inlet to the piston chamber, and a spring coiled about the tube and confined between the slidable collar and a fixed collar on the tube to maintain both of the cone-shaped collars,

seated in the inlets to the piston chamber, substantially as and for the purpose fied.

6. In a syringe, the combination with a reservoir having an outlet, of a piston chamber mounted in fixed position in the reservoir adjacent the side thereof; intake ports in the Wall of the piston chamber adjacent opposite ends; discharge ports in the Wall of the piston chamber adjacent opposite ends connected tothe outlet of the reservoir; a piston to reciprocate in said chamber; an intake tube extending longitudinally of the reservoir with its ends adjacent the side and opposite ends oi" the reservoir; and means to connect said `tube With the intake ports of the piston chamber and arranged for movement of the tube about an axis centrally of the reservoir.`

'7. In a syringe, the combination With a reservoir having an outlet, of a piston chamber mounted in fixed position in the reservoir; intake ports in the Wall of the piston chamber adjacent opposite ends; discharge ports in the Wall of the piston chamber adjacent opposite ends connected'to the outlet of the reservoir; a piston to reciprocate in said chamber; said piston chamber and piston being located adjacent the Wall of the reservoir; a tube extending parallel With the piston chamber With its ends adjacent opposite ends of the reservoir; means `to connect said tube with the intake ports of the piston chamber and arranged to posispecition the tube adjacent the side of the reservoir and to have movement about an axis centrally of the reservoir; and gravity valves carried by the tube operative to open the inlets ot the tube to the reservoir and to sluit off said inlets trom the reservoir, said valves being operative in unison Whereby as one valve closes an inlet to the tube the other valve will open the other inlet ot the tube to the reservoir, substantially as and for the purpose specified.

8. In a syringe7 the combination with a reservoir having an outlet, of a piston chamber in the reservoir having intake ports adjacent opposite ends to connect the piston clianiber to the reservoir and having discharge ports adjacent opposite ends connected to the out-let of the reservoir; a piston to reciprocate in the piston chamber; and means in the line of discharge to break siphoii, substantially as and for the pui'- pose specified.

9. In a syringe7 the combination of a ieservoir having an outlet; a piston chamber in the reservoir having intake ports adjacent opposite ends te connect the piston chamber to the reservoir and having discharge ports adjacent opposite ends connected to the outlet of the reservoir; a piston to reciprocate in the piston chamber; and a valved air inlet in the line of discharge to bi'eak a siplion, substantially as and for the purpose speciiied.

10.111 a syringe, the combination of a tubular reservoir having an outlet; a pump cylinder in said reservoir at one side thereof a piston to reciprocate in said cylinder; inlet ports to the cylinder at opposite sides of the piston; a passage arranged centrally of the reservoir and connected to the inlet ports of the cylinder to have rotative movement about said connection, said passage carrying suction valves to control the connection of the inlet ports With said passage: an intake tube extending longitudinally oi and having inlets from opposite ends ot the reservoir; means to rigidly connect said tube intermediate its ends with the passage in communication therewith intermediate the suction valves arranged to position the i intake tube adjacent the side of the reservoir and participate in the rotative movement of the passage whereby said tube is adapted to assuine variable positions near the side of the reservoir; and outlet ports from the cylinder at opposite sides of the piston connected to tliereservoir outletl for the purpose specified.

il. lin a syringe, the combination of a reservoir having an outlet; a pump cylinder in said reservoir; a piston to reciprocate in said cylinder; inlet ports to the cylinder at opposite sides of the piston; a valve chamber arranged centrally ot' the reservoir connected to both of the inlets oi@ the cylinder to have rotative movement about said connection; valve mechanism in said chamber opening into and closing outivard from the cylinder and operable 'to control the How of liquid to opposite ends ot' the cylindeiduiing the reciprocation of the piston; intake means from opposite ends of the reservoir connected to said valve chamber intermediate the valve mechanism to particithe liquid at one end ot the reservoir' when it is connected with the liquid at the opposite end; and valve controlled outlet ports' from the cylinder at opposite sides of the piston connected to the outlet of the reservoir.

GEO. T. PEARSNS. 

